CVE-2026-20863
Double Free in Windows Win32K Enables Local Privilege Escalation
Publication date: 2026-01-13
Last updated on: 2026-01-13
Assigner: Microsoft Corporation
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | windows_win32k | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-415 | The product calls free() twice on the same memory address. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a double free issue in the Windows Win32K component called ICOMP. It allows an authorized attacker to locally elevate their privileges on the affected system. [1]
How can this vulnerability impact me? :
An attacker who already has some level of access to the system can exploit this vulnerability to gain higher privileges, potentially allowing them to perform unauthorized actions or access sensitive information. [1]
What immediate steps should I take to mitigate this vulnerability?
Apply the security updates provided by Microsoft for CVE-2026-20863 as soon as possible to mitigate the elevation of privilege vulnerability caused by the double free in Windows Win32K - ICOMP. [1]